MCQ
A conjoint and open vascular bundle will be observed in the transverse section of:
- AMonocot root.
- BMonocot stem.
- CDicot root.
- DDicot stem.
Explanation:
Each vascular bundle is conjoint, open and with endarch protoxylem in the stem of dicot plant.
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$I.$ Increase in the volume of the thoracic chamber in dorsoventral axis
$II.$ Upward and outward movement of the ribs
$III.$ Contraction of intercostal muscles
$IV.$ Entry of air inside the lungs
$V.$ Contraction of the diaphragm
$VI.$ Increase in the volume of the thoracic chamber in antero-posterior axis
Choose the correct option
| List $I$ | List $II$ |
| $A$. $P$-wave | $I$. Beginning of systole |
| $B$. $Q$-wave | $II$. Repolarisation of ventricles |
| $C$. $QRS$ complex | $III$. Depolarisation of atria |
| $D$. $T$-wave | $IV$. Depolarisation of ventricles |
Choose the correct answer from the options given below :